The number of connections per instances depends on what actions you're taking when connected to the client VM. This is called host scaling.Įach instance can support 20 concurrent RDP connections and 40 concurrent SSH connections for medium workloads (see Azure subscription limits and quotas for more information). If you use the Standard SKU, you can specify the number of instances. When you configure Azure Bastion using the Basic SKU, two instances are created. You connect to client VMs via an Azure Bastion instance. An instance is also referred to as a scale unit. It's fully managed by Azure and runs all of the processes needed for Azure Bastion.
You can configure this setting using the following methods: MethodĪzure Bastion requires a Public IP address. The subnet can't contain other resources.The subnet must be in the same VNet and resource group as the bastion host.For more information, see the Host scaling section of this article. Using a smaller subnet space limits the number of scale units. For host scaling, a /26 or larger subnet is recommended.Subnet size must be /26 or larger (/25, /24 etc.).Subnet name must be AzureBastionSubnet.The subnet must have the following configuration: You must create this subnet in the same virtual network that you want to deploy Azure Bastion to. All Azure Bastion resources deployed in subnets of size /27 prior to this date are unaffected by this change and will continue to work, but we highly recommend increasing the size of any existing AzureBastionSubnet to /26 in case you choose to take advantage of host scaling in the future.Īzure Bastion requires a dedicated subnet: AzureBastionSubnet. FeatureĬonnect to target VMs in peered virtual networksĪccess Linux VM Private Keys in Azure Key Vault (AKV)Īzure Bastion supports upgrading from a Basic to a Standard SKU.įor Azure Bastion resources deployed on or after November 2, 2021, the minimum AzureBastionSubnet size is /26 or larger (/25, /24, etc.).
The following table shows the availability of features per corresponding SKU. The Standard SKU enables premium features.The Basic SKU provides base functionality, enabling Azure Bastion to manage RDP/SSH connectivity to virtual machines (VMs) without exposing public IP addresses on the target application VMs.
Bastion main upgrade#
You can upgrade a Basic SKU to a Standard SKU. The SKU is configured in the Azure portal during the workflow when you configure Bastion. Azure Bastion supports two SKU types: Basic and Standard.
APO/FPO, Afghanistan, Africa, American Samoa, Andorra, Anguilla, Antigua and Barbuda, Armenia, Aruba, Azerbaijan Republic, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Bermuda, Bhutan, Bosnia and Herzegovina, British Virgin Islands, Brunei Darussalam, Cayman Islands, China, Cook Islands, Costa Rica, Dominica, Dominican Republic, El Salvador, Estonia, Falkland Islands (Islas Malvinas), Fiji, French Guiana, French Polynesia, Georgia, Germany, Gibraltar, Greenland, Grenada, Guadeloupe, Guam, Guatemala, Guyana, Haiti, Honduras, Hong Kong, Iraq, Jamaica, Jordan, Kazakhstan, Kiribati, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Liechtenstein, Macau, Maldives, Marshall Islands, Martinique, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Montserrat, Nauru, Nepal, Netherlands Antilles, New Caledonia, Nicaragua, Niue, Oman, Palau, Panama, Papua New Guinea, Paraguay, Qatar, Republic of Croatia, Romania, Russian Federation, Saint Kitts-Nevis, Saint Lucia, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, San Marino, Serbia, Slovakia, Slovenia, Solomon Islands, South Korea, Suriname, Svalbard and Jan Mayen, Taiwan, Tajikistan, Tonga, Trinidad and Tobago, Turkmenistan, Turks and Caicos Islands, Tuvalu, Ukraine, United Arab Emirates, Uzbekistan, Vanuatu, Vatican City State, Virgin Islands (U.S.The sections in this article discuss the resources and settings for Azure Bastion.
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